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September 19th, 2016 07:00

Morrorview /S manual recovery

Hi Folks,

can somebody describe the manual recovery(without SRM or something else) process of vSphere VMs?

Scenario would be 2x VNX5200 in two sites with Mirrorview/S configured LUNs, one SAN Fabric with some Vmware Hosts attached.

My idea is to configure the zoning on the fabric, so the ESXi Servers also can see the secondary VNX. Also preconfigure Masking on the sec. VNX.

After the primary VNX fails completly, we promote the sec. LUNs and register the VMs from this LUNs.

Thats it?

Are there some more points to that we need to consider?

Best Regards

Didi

12 Posts

September 22nd, 2016 05:00

It does not. But a majority of peoples use SRM to automate that part.

You could also use this LucD script to automate the process:

http://www.lucd.info/2011/08/11/vmx-raiders-revisited/

9 Legend

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20.4K Posts

September 19th, 2016 14:00

so you would zone but not present any LUNs ? As you know MirrorView target LUNs are in "read-only" mode when MirrorView is syncing and also when it's fractured.  To make them truly read-write you will need to promote them or fracture/delete secondary.

4 Operator

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8.6K Posts

September 19th, 2016 15:00

11 Posts

September 20th, 2016 07:00

I think it would be no problem also to present the secondary LUNs to the Hosts. As you say they are in read-only and have probably different names. And yes I know, only after promote i can deal with them.

What I want to know is, after the promote action, do i have to reregister the VMs on the secondary(now primary) LUNs?

1 Rookie

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54 Posts

September 20th, 2016 13:00

The best way to test the behaviors of the mirrored LUNs in your environment would be to clone or snapshot them.

That way, you don't have to fracture the synhcronisation before you can test a read/write LUN, this can be done while syncing.

9 Legend

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20.4K Posts

September 20th, 2016 14:00

Didi wrote:

What I want to know is, after the promote action, do i have to reregister the VMs on the secondary(now primary) LUNs?

yes, I believe SRM does that for you but since you are doing it manually you will need to register them in vCenter.

11 Posts

September 22nd, 2016 00:00

Rainer,

you mean this section of the document(Page 209)?

4. Right-click a consistency group and select Synchronize to synchronize all LUNs as

MirrorView LUN synchronization performs the following changes:

  • Sets the primary images on the production site to write-disabled.
  • Reverses the mirror relationship of the devices. The devices at the remote site assume the primary role and are set to write-enabled.
  • Resumes the MirrorView link to allow updates to flow from the remote data center to the production data center.
  • Registers and powers on the virtual machine from the vSphere client or command line utilities.

I'm a little bit confused about the last point. Can not imagine that the process does it automatically.

Regards

Didi

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